Sound-reproducing record.



v E. LESGHBRANDT.

SOUND RBPRODUGING RECORD. APPLIGATION nun mm 2,1906.

908,683. Patented Jan. 5, 1909.

INVEN OR WZVITNESSES: Z J

ATTORNEY UNITED sTATEs PATENT erosion EINAR LESCHBRANDT, OF PHILADELPHIA, PENNSYLVANIA.

sotmn-nnrnonucmennconro.

Specification of Letters Patent.

Fatented Jan. a, icon Application filed June 2, 1906. semi 110,319,855.

Top/ll whom it may concern:

Be it known that I, EINAR LEsorrBRANDT,

a subject of the King of orway, and a resi-i dent of the city and county of rhiladelphia, State of Pennsylvania, have invented cer tain new'and useful Improvements in Sound Reproducing Records, of which the following is a specification;

My invention relates to an improved sound reproduc ng record, and it consists of a.

, strip of paper, or other suitable material,

provided with an air pervious pattern cor-r.- respondmg in form to the sound wave or waves to be reproduced. p Sound is, orconsists of, a series of" rare factions and condensations, of the-air and, as is well known, rarefactions andcbndensations Ina by means that are well known and whic it will be unnecessary to describe here, be'photographed or otherwise raphic- I ally represented upon a hotograp plate or filmor other article. he graphic representation of the sound waves appears as an irregular line; If the plate, film, or strip *carrying'the irregularline representing the 3 sound waves 'bep'erforated orotherwise made air pervious, to one "side of said line, the sounds corresponding tosaid pattern may be reproduced by' passing a current ofair. through"saidperforations.

" In" the" accompanying drawings Figure 1 represents a film or strip of material carrying graphic representation of a sound wave,

Fig. 2, the same perforated. I

(lie a strip or ribbon of paper, or other suitable. material, carrying a pictorial representation of the sound wave or waves to be re reduced. The representation of the soun waves may be formed in any suitable manner but for accuracy and convenience prefer to form them photographically and to this end the stripjor ribbon of paper iecoatsd with, or is formed of, a photographic mm which is exposed to aibeam of light which,

mention here, is made to vibrate in unison with the sounds.- This beam of light being caused to' impinge upon the moving film there will be recorded thereon the movements of the beam and the film being developed 111.

the usualrnanner' ofphotographic fiims or lates will show. a figure b of irregular out-- ine which will be in fact a photographic nega tive of the sounds.

I To reproduce the sounds either the record itself, or a counterpart of it, which has been perforated as shown in Fig. 2, or oths: wise -made pervious to air, is drawn past an aper the passage therethrou h of a current of EINAR ESCHBRANDT.

Witnesses:

GEORGE SEL'rzER,

CnARLEs'A. BUTTER.

through suitable means not necessary 

